Hello krd1749,
First of all, with Audacity, you simply want to save any wav files of tracks or complete songs with the proper bit deph i.e 24-bit, and sample rate, i.e. 48khz, use an easy naming convention, i.e. "Drums" or "Keys" or "Gtr", something like that, now save that file or files in a folder on your computer somewhere easy to find, now plug the USB connector from the DP-24 into your computer, the computer should recognize the SDHC card in the DP, and bring it up on your windows computer or MAC whichever flavor you have as a "drive" letter, you will see folders on the SDHC card, one will be called "Audio Depot", you simply copy one of the wav files you created to the "Audio Depot" folder, or copy all the files to that folder, make a note on which files were stereo and which were mono, now unplug the DP-24's USB connector from the computer, and on the DP-24, go to the "Audio Depot folder, and you should see the wav files you just copied from your computer, now once you're there you should be within a DP project already setup with the proper bit deph, i.e. 24-bit, and the sample rate, i.e. 48khz, you will see all of the available tracks mono and stereo to import to, and your wav files will have little boxes to the left for you to put a check on it, so as to select it, you can then select which track to place it on, if you get lost at this point remember to read the manual, it should start to make some sense from here...if not you may want to think about purchasing the DP-24 DVD which will go into this scenario in great detail, hope this works for you.
Jimi Jones